Помогите,дам все баллы!!!!!!!!
(19 • 700) : 70 – 850+x/18 = 6000 : 50,
13300 : 70 – 850+x/18 = 120,
190 – 850+x/18 = 120 | • 18,
3420 – (850 + x) = 2160,
3420 – 850 – x = 2160,
2570 – x = 2160,
–x = 2160 – 2570,
–x = –410 | • (–1),
x = 410.